Archived posting to the Leica Users Group, 2002/03/01

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Subject: [Leica] Re: Really simple chemistry question D76
From: Jim Brick <jim@brick.org>
Date: Fri, 01 Mar 2002 15:27:05 -0800
References: <200203011846.NAA04345@newman.concentric.net>

In photo chemistry, 1:4 ALWAYS means one part of chemical plus 4 parts of 
water equaling 5 total parts.

2 liters used 1:4 gives you 10 liters total.

Jim


At 02:35 PM 3/1/2002 -0500, Jeffrey Frankel wrote:
>I know, Its all in the semantics, thats why I replied 2.5X dilution.  I
>think that it is less confusing when stated like that.
>
>If you assume that 1:4 means "one part in four" than you end up with a 25%
>solution (8 liters).  If you assume it to mean "one part to four" than you
>are correct, you would have a 20% solution (or 10 liters of solution).
>In either case Peters dilution would be wrong.
>Jeff
>
> > >I don't think your math holds up.
> > >
> > >Two liters diluted 1:4 would give you a total of 8 liters of solution (if
> > >you diluted the entire stock solution)
> >
> > I don't think your math holds up.
> > Two liters diluted 1:4 would give you a total of 10 liters of solution.
> >
> > ---Peter (going for a new Olympic record for highest post/response ratio)

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In reply to: Message from pmjensen <pmjensen@concentric.net> ([Leica] Really simple chemistry question D76)